check

Runs the spell checker over the first spellcheck relation query node in
the abstract query tree and returns a suggestion in case this
spellchecker thinks the words are misspelled. If the spellchecker
determines that the words are spelled correctly null is
returned.

Parameters:

aqt - the abstract query tree, which may contain a relation query
node with a spellcheck operation.

Returns:

a suggestion or null if this spell checker
determines that the fulltext query statement is spelled
correctly.